Here are our favorite types of freshwater fish you can keep as a pet. If you're in the throes of setting up a home aquarium, ...

At the base of the Grand Teton Mountain range, a new fish species tinged with green was identified as separate from its blue brethren.

Fish are among the most unique and fascinating groups of animals that can be found swimming and inhabiting both freshwater and saltwater habitats alike. With tens of thousands of fish species and a ...

The ricefield eel (Monopterus albus) is the only protogynous hermaphrodite freshwater fish. How this species changes its sex ...